Re: PROBLEM: TObjArray and *** Break *** segmentation violation

From: Rene Brun <Rene.Brun_at_cern.ch>
Date: Mon, 13 Oct 2008 11:51:47 +0200

It looks like a problem in your Alice classes. When I comment your calls to these classes (see below) your script works correctly.

Rene Brun

void roberta() {
//int main(int argc, char **argv) {
//if (argc!=3) {
// printf("Usage: analyzerefScan.exe refDataDir runNr\n");
// return -1;
//}

//TString refDataDir = Form("%s",argv[1]);
//UInt_t runNr = atoi(argv[2]);
 

  char name[50];  

  TObjArray *Hlist = new TObjArray(600);   TH1I *h1[20][6][10];  

//UInt_t step = 0;

  TRandom3 r;
//AliITSOnlineSPDscan *scanObj[20];

  for (UInt_t eq=0; eq<20; eq++) {
    //TString fileName =
Form("%s/%d_SPD_ref_scan_eq_%d",refDataDir.Data(),runNr,eq);

    //scanObj[eq] = new AliITSOnlineSPDscan(fileName.Data());

    for (UInt_t hs=0; hs<6; hs++) {

      for (UInt_t chip=0; chip<10; chip++) {   
        sprintf(name, "eq %d hs %d chip %d", eq,hs,chip);   

    h1[eq][hs][chip] = new TH1I(name,name,101,0,101);     Hlist->Add(h1[eq][hs][chip]);
    for (UInt_t col=0; col<32; col++) {

      for (UInt_t row=0; row<26; row++) {
        //UInt_t nrHits = scanObj[eq]->GetHits(step,hs,chip,col,row);
        UInt_t nrHits = r.Uniform(1,100);
        h1[eq][hs][chip]->Fill(nrHits);
      }

    }    

      }
    }    

    //delete scanObj[eq];
  }  

  TFile hfile("histos.root", "RECREATE");  

  Hlist->Write();
  hfile.Close();

  return 0;
}

Roberta Ferretti wrote:

> Hello!
>
> I have a problem: I am trying to create a Root file and 600 histograms, fill each histogram and write them to the file.
> Here is the code I am using:
>
> int main(int argc, char **argv) {
>   if (argc!=3) {
>     printf("Usage: analyzerefScan.exe refDataDir runNr\n");
>     return -1;
>   }
>
>   TString refDataDir = Form("%s",argv[1]);
>   UInt_t runNr = atoi(argv[2]);
>   
>   char name[50];
>   
>   TObjArray *Hlist = new TObjArray(600);
>   TH1I *h1[20][6][10];
>   
>
>   UInt_t step = 0;
>
>   AliITSOnlineSPDscan *scanObj[20];
>   for (UInt_t eq=0; eq<20; eq++) {
>     TString fileName = Form("%s/%d_SPD_ref_scan_eq_%d",refDataDir.Data(),runNr,eq);
>     scanObj[eq] = new AliITSOnlineSPDscan(fileName.Data());
>
>     for (UInt_t hs=0; hs<6; hs++) {
>       for (UInt_t chip=0; chip<10; chip++) {	
>         sprintf(name, "eq %d hs %d chip %d", eq,hs,chip);    
> 	h1[eq][hs][chip] = new TH1I(name,name,101,0,101);
> 	Hlist->Add(h1[eq][hs][chip]);
> 	for (UInt_t col=0; col<32; col++) {
> 	  for (UInt_t row=0; row<26; row++) {
> 	    UInt_t nrHits = scanObj[eq]->GetHits(step,hs,chip,col,row);
> 	    h1[eq][hs][chip]->Fill(nrHits);
> 	  }
> 	}
> 	
>       }
>     }
>     
>     delete scanObj[eq];
>   }
>   
>   TFile hfile("histos.root", "RECREATE");
>   
>   Hlist->Write();
>   hfile.Close();
>
>   return 0;
> }
>
>
> When I try to run it, the following message appeared:
>
>
> *** Break *** segmentation violation
> (no debugging symbols found)
> Using host libthread_db library "/lib/tls/libthread_db.so.1".
> Attaching to program: /proc/7998/exe, process 7998
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> (no debugging symbols found)...done.
> [Thread debugging using libthread_db enabled]
> [New Thread -1278355776 (LWP 7998)]
> 0x00aeb7a2 in _dl_sysinfo_int80 ()
>    from /lib/ld-linux.so.2
> #1  0x0213df13 in __waitpid_nocancel () from /lib/tls/libc.so.6
> #2  0x020e77b9 in do_system () from /lib/tls/libc.so.6
> #3  0x01b7198d in system () from /lib/tls/libpthread.so.0
> #4  0x002e25b7 in TUnixSystem::Exec ()
>    from /home/rferrett/root/v5-21-01-alice/lib/libCore.so
> #5  0x002e8041 in TUnixSystem::StackTrace ()
>    from /home/rferrett/root/v5-21-01-alice/lib/libCore.so
> #6  0x002e4c86 in TUnixSystem::DispatchSignals ()
>    from /home/rferrett/root/v5-21-01-alice/lib/libCore.so
> #7  0x002e4d14 in SigHandler ()
>    from /home/rferrett/root/v5-21-01-alice/lib/libCore.so
> #8  0x002e3f59 in sighandler ()
>    from /home/rferrett/root/v5-21-01-alice/lib/libCore.so
> #9  <signal handler called>
> #10 0xb3e14f0f in AliITSOnlineSPDscan::GetNSteps (this=0x0)
>     at ITS/AliITSOnlineSPDscanInfo.h:41
> #11 0xb3e14963 in AliITSOnlineSPDscan::GetHits (this=0x8a4c0a0, nsi=0, hs=0,
>     chipi=0, coli=0, rowi=0) at ITS/AliITSOnlineSPDscan.cxx:260
> #12 0x080496b3 in main ()
>
>
> Where is the problem? What I have to do?
>
> Thank you very much.
>
> RF
>
>   

Received on Mon Oct 13 2008 - 11:52:29 CEST